If you prefer managing system components through PowerShell, you can achieve the same result using the Deployment Image Servicing and Management cmdlets.
Ensure the path inside the quotation marks matches your actual drive letter and folder structure. If the issue persists, append the /LimitAccess switch to your DISM command to force Windows to completely ignore online servers: cab file for .net framework 3.5
If downloading a full ISO is not feasible, you can source the standalone CAB. A common name for this is NetFx3.cab . However, be extremely cautious: If you prefer managing system components through PowerShell,
If you do not have installation media, Microsoft provides standalone installers that handle the process for you: Official .NET Framework 3.5 SP1 Download : Includes the web and full offline installers. Microsoft Download Center A common name for this is NetFx3
DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs Use code with caution. Copied to clipboard
Save the file as Install_NET35.bat and place it in the same folder as your NetFx3.cab file. Run this batch file as an administrator.